Hi @Bjarke,
This is a good arrangement of the piece. I'm just wondering why you sometimes cut off voices strictly, for example in p.7 b.2 I know that the voice for clarinet and trombones (plus others) is a false subject but maybe I will at add a G after the phrase, instead of having the phrase so clear cut, or in p.6 b.4 the horns and trombones cutting off seem strange to me. In p.8 b.2, if you have notated a2, then you don't have to use both stems to indicate the two horns. The trumpet there can just mark an a3, instead of having an additional a2 for 2, 3 there. The pizz. in p.11 for the lower strings seem too weak for the fugue subject and they will be overshadowed by the trombones and tuba. The harp for me seems unnecessary with not too much appearance in the piece. Also, maybe there will be breathing issues for the woodwind given how many notes they will have to play and how quickly the tonguing has to be, for example in p.10 b.4 to p.13 b.2 with 11 bars non-stop playing.
Nonetheless I enjoy this arrangement!
Henry